[PHP] Re: select-option link list

[Ricky Morley]

Like this. Here's the html code. I'm sure you can convert to the  
appropriate PHP





http://www.google.com";>Google
http://www.yahoo.com";>Yahoo
http://www.microsoft.com";>MS





On Wed, 19 Jan 2005 20:10:25 +0200, William Stokes <[EMAIL PROTECTED]>  
wrote:

Hello,
Hope someone can give some directions...
I'm trying to create a list box of links to other pages. I just can't  
figure
out how to move to the other page whe user selects one of the options in  
the
list box.

here's the code...
$sql="SELECT team_name FROM teams";
$result=mysql_query($sql);
$num = mysql_num_rows($result);
$cur = 1;
print "";
print "";
while ($num >= $cur) {
$row = mysql_fetch_array($result);
$team_name = $row["team_name "];
print "$team_name ";
$cur++;
}
print "";
print "";
print "";
This propably can be don without the "Go" button. But i Don't know how...
Thank a lot
-Will
BTW thanks for the debugging stuff earlier. Got that workin...
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Re: [PHP] Clear POST variables on page refresh

[Ricky Morley]

Richard Lynch 
on Thursday, February 03, 2005 11:26 AM said:
A simple thing to do is to put an md5 hash into the POST data, then
only do the insert if that md5 hash isn't already "used" when they
hit refresh.
Thank you for your responses. One question: If I were to use the md5 hash  
method, what would be the best way to store used hashes? In a database? In  
a temporary file kinda thing? Thanks again.

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Re: [PHP] Clear POST variables on page refresh

[Ricky Morley]

You're wonderful. Thank you very much.

On Thu, 3 Feb 2005 13:02:14 -0800 (PST), Richard Lynch <[EMAIL PROTECTED]>  
wrote:

Ricky Morley wrote:
Richard Lynch <mailto:[EMAIL PROTECTED]>
on Thursday, February 03, 2005 11:26 AM said:
A simple thing to do is to put an md5 hash into the POST data, then
only do the insert if that md5 hash isn't already "used" when they
hit refresh.
Thank you for your responses. One question: If I were to use the md5  
hash
method, what would be the best way to store used hashes? In a database?  
In
a temporary file kinda thing? Thanks again.
In a database with a datetime field.
Clear out anything older than a day or whatever in a cron job.
For a super busy site, you'd want to clear them out more often.
Or, to simplify matters, if you already have sessions, then do this:

  //Check their FORM freshness, and only process fresh input, not  
re-loaded:
  $fresh = $_POST['fresh'];
  $used = isset($_SESSION['used']) ? $_SESSION['used'] : array();
  if (isset($used[$fresh])){
echo "Ignoring re-posted data: $fresh\n";
  }
  else{
echo "INSERT INTO whatever (duplicate) VALUES ('$_POST[duplicate]')";
$used[$fresh] = TRUE;
$_SESSION['used'] = $used;
  }

?>

  
  
  

Make sure any test for a session time-out occurs BEFORE this test for
'fresh' data -- so they can't wait for the session to time-out, and then
re-load, and get their duplicate "in" that way.
You could put most of the code to check for freshness in an include file,
and use it on a zillion forms.
Just put the INPUT HIDDEN with NAME='fresh' and an MD5 in every form and
be sure to: include 'freshness.inc'; before processing.
Or put it in a function you define in your globals.inc (or whatever gets
loaded every page).
It's simple and browser-independent, so it doesn't matter if they hit  
back
or not or re-load or their browser sends or doesn't send the signal  
needed
for ignore_user_abort to work or...

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